Valve.



APPLICATION FILED NOV.27. 1905.

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PATENT OFFIOE.

FRANK SOHREIDT, OF MANSFIELD, OHIO.

VALVE.

Specification of Letters Patent.

A.ratern'seot May 29, 1906.

Application led November 27, 1905. Serial No. 289,171.

T0 all whom it may concern:

Be it known that I, FRANK SCHREIDT, a citizen of the United States of America, and a resident of the city of Mansfield, Richland county, Ohio, have invented certain new and useful Improvements in Valves, of which the following is a specification.

My invention consists in the combination of an automatic and hand relief-valve for steam-engine cylinders or other apparatus in which it is desirable to maintain the pressure at a predetermined amount.

The objects are to provide a means of securing a spring-case to the body portion of the valve in such a manner as to inclose and com ress a spiral spring within the case, Whic exerts a pressure against the valve mechanism, keeping the disk in close contact with the seat under the tension of the spring, and Jfacilitates for increasing or decreasing the tension of the spring to conform to the pressure determined upon to open the valve and relieve the pressure.

A further object is to provide a thread-concealing lock-nut that will rigidly connect in the case and body and prevent the escape of steam through the connecting mechanism.

Another object is to construct the valve and stern so as to obviate the necessity of using a stuffing-box to prevent the escape of stem, thereby avoiding the friction incident to packing the stem, which interferes with the operation of the valve mechanism.

I attain these and other objects by the mechanism illustrated in the accompanying drawings, in which# Figure 1 is a vertical cross-sectional side elevation of the device, showing the detail of' Y the operating mechanism. Fig. 2 is a top view of the wheel-disk. Fig. 3 is a bottom view of the upper portion of the stem. Fig. 4 is a top view of the locking-nut. Fig. 5 is a bottom view of the combined valve-holder Yand valve, taken through Fig. 1 on the line In the drawings, 1 represents the body of the valve. The upwardly-projecting portion 2 is interiorly screw-threaded, with the end terminating with an annular rib 3, having an inclined inner face. A cylindrical springcase 5, having its lower end exteriorly screwthreaded, is adjustably fitted to the threaded aperture of the projectin portion 2. The upper portion 6 of the va ve 7 is tel'escoped into the inner periphery of the valve-case and reciprocates therein when movement is im-l steam or other substance passing through the inlet-aperture 8 against the valves 7 and 9. vThe lower portion 1() of the valve is made smaller in diameter, leaving an annular inwardly-extending shoulder 11 surrounding a screw-threaded aperture 12, formed in the lower portion of the valve. Wings 12 are made inte ral with the valve-disk and depend into t e inlet-aperture 8 for the purpose of guiding and keeping the valve in alinement. An angular washer 13 is fitted to inner periphery of upper portion of the valve, resting on the annular shoulder 11. A spiral spring 14 is compressed and inclosed within the spring-case 5 and the tubular portion of inner face 15 of the top of the case and the opposite end encircling and resting on the flanged washer and exerting a pressure downward against the valve-holder, keeping the valve 7 in contact with the valve-seat 16 under a predeterminedtension, which is regulated and controlled by Ithe adjustment of the valve-case in the screw-threaded portion 2 of the valve, which compresses the spiral s ring more or less, thereby increasing or ecreasing the tension of the spring to conform to the pressure desired to open the valve. The upper portion 17 of the valvecase is screw-threaded and is adapted to engage with the screw-threaded interior of a nut 18, which is provided with a depending annular flange 19, interiorly screw-threaded and adapted to com letely inclose and engage with the threaded exterior of the valve-case.

pered to lit the inclined portion ofthe annular. rib 3, when Vthe tension of the spiral spring is adjusted to keep the valve closed under apredetermined pressure. The threadconcealing lock-nut 18 is screwed down until the tapered end is brought in contact with the inclosed portion of the rib 3, securely connecting the valve-case to the valve and at the same time making an air or steam tight joint with the friction .on the stem incident toits use, which interferes with its operation. The .flange of the locking-nut 18 is provided with around the exterior of the valve-case and rib when it is screwed into the' a erture of the projecting portion 2 ofthe va ve. Aspace 22 is also provided to permit the adjustment parted to the valve by the pressure of the the valve, with one end pressing against the The end 20 of the depending flanges is ta- IOO without the use of the ordinary stuffing-box a kerf`21 to permit the contraction ol' the nut r IIO of the spring-case either Way without effecting the locking connection. A groove 23 is formed in the valve-holder, into which a feather 24 is fitted to prevent the holder from turning when movement is imparted to the valve.

The above describes the operation of the automatic relief-valve mechanism. To provide a means of opening and closing the valve by hand, the upper portion 25 of the valve-disk 9 is extended and provided with a screw-threaded periphery which engages the screw-threaded aperture 12. The lower portion of the stem 26 is made to fit the aperture in the washer 13, leaving the upper portion 27 projecting upward into the valve-case. The upper portion 27 of the valve-stem is preferably formed to correspond with a segment (see Fig. 3) of a circle.

A socket 28, having an enlarged lower portion, is secured in an aperture in the top of the kvalve-case 29 and provided with an aperture similar to the end 27 of the valve-stem telescoping therewith. The end 30 of the socket 28 is formed to correspond with a segment of a circle and extends over the top 31 of the valve-case. A circular disk 32 is fitted to the end 30 0f the socket. An annular-tapered rib 33 is formed on the bottom of the disk and adapted to fit an annular groove 34, formed on the top and inner periphery of the `valve-case adjacent to' the aperture into which the socket 28 is fitted. The disk 32 is provided with two pins 35. dA wheel 36, having apertures into which the pins 35 extend, is lfitted to the outer periphery 37 of the end 30 of the socket. A screw-threaded aperture 38 is provided in the end of-the socket 28 to receive a screw 39. A washer 40 is interposed between the head of the screw and the top of the boss 41 of the disk. It will be observed that when the screw 39 is tightened the shoulder 42 of the socket 28 is forced in close contactwith the valve-case and the ,annular rib 33 is seated in the groove 34, thereby preventing the steam from escaping .around the socket. When it is desired to open the valve by hand, the wheel 36 is turned in the ordinary way and the end 27 .telescopes within the aperture formed in the socket and the disk 9 is raised from its seat, permitting the escape of the steam or air throughthe ports 43. Reference-letter a indicates the outlet-aperture of the valve.

It will be noted that the exterior of the t e hexagon portion of the nut is reduced in .s ring-case is free from any obstruction and diameter to permit the lock-nut to be placed thereon from the top, leaving a portion b, 4wlfiich is not threaded, in close contact with the outer periphery of the case.

Having fully described my invention, what I claim, and desire to secure by Letters'l-atent, is-'` 1. In a relief-valve, a spring-case secured thereto, a valve-holder movably fitted to the inner peri hery of said spring-case, a spiral spring inc osed within said case and holder, a thread-concealing lock-nut adapted to engage with the threaded exterior of the springcase having a depending flange with its end tapered and adapted to seat on the inclined annular rib formed on the body portion of the valve.

2. A relief-valve composed of a body having a projecting portion with an inclined annular face formed in the end, a valve-case having its end screw-threaded and adapted to engage with the screw-threaded interior of the projecting portion of the valve, a valveholder having an inwardly-extending shoulder, a fianged washer resting thereon, a spiral spring compressed between the upper portion of the valve-case and washer exerting a pressure against the valve keeping it in contact with the valve-seat, means for varying the tension of the spring to permit the valve to be opened at a predetermined pressure, an inclined annular face formed adjacent to the inner periphery of the projecting portion of the valve, a Ythread concealing lock nut adapted to connectl said projecting portion with the valve-case.

3. In a relief-valve, a valve-case secured to the body portion, a nut adapted to connect said valve-case to the body and to prevent the escape of steam or air, a spiral spring compressed and inclosed within said case, a valve-holder telescoped Within the valvecase and adapted to reciprocate, wings secured to the valve-holder and fitted to the inlet-aperture keeping the valve in alinement when movement is imparted to it, a valvedisk having a threaded exterior adapted'ito engage with the threaded aperture of the valve-holder, a stem with its free end extending upward, a socket fitted to an aperture in top of the valve-case with the end depending into the case and the free end of the valvestem telescoping with the aperture provided in the socket.

4. In a valve the combination of a body having a projecting portion with an inclined annular groove formed in the end of the projecting portion, a valve-case secured thereto, a thread-concealing lock-nut adapted to connect said valve-case to the bottom of the valve, a valve-holder having a disk made integral therewith with the end fitted to the inner periphery of the valve-case, a screwthreaded aperture provided in the lower portion of the valve holder and disk, a valve secured therein, a valve-stem secured to said valve and extending upward into the valvecase, a socket secured to an aperture on the to of said valve-case, a disk having an annu ar rib formed in the top of the case, a wheel secured to said disk, means for securely seating said annular rib in the annular groove, means to open said valve manually.

IOO

IOS

5. In a valve composed of body portion 13o having a valve-case secured thereto, a locking-nut adapted to connect said valve-case and body portion, a valve-holder having a valve-disk made integral therewith With Wings depending therefrom, a spiral spring inclosed and compressed Within the tubular portion of the valve-case and valve-holder adapted to exert a pressure against the valveholder keeping the valve in contact With the seat, means for regulating the tension of the spring, a valve secured to the threaded aperture of the valve-holder, a stem secured to said valve, a socket secured to upper portion of the valve-case having an aperture therein telescoping With the free end of the valvestem, means for securing said socket to the valve-case, means for opening said valve manually, means for varying the tension of the spiral spring to conform to the pressure desired to automatically release said valve.

6. In a valve the combination of an automatic and-hand-relief valve composed of a body portion having a projecting portion made integral with an inclined annular rib formed in the end, a valve-case having its end screw-threaded and adaptedA to engage With the threaded inner periphery of the valve, a thread concealing lock-nut having a depending flange With the end inclined and adapted to contact With the annular rib formed on the projecting portion of the valve, a valve-holder having its free end telescoped Within the valve-case, a spiral spring inclosed Within the tubular end of the valve-case and holder, a yWasher resting on an inwardly-extending annular shoulder and adapted to support one end of said spiral spring, a valve secured to an aperture provided in the valveholder having a stem extending upwardly into the valve-case, a socket secured to the upper portion of the valve-chamber having an aperture adapted to fit the free end of the stem, a disk secured to the projecting end of the socket having an annular rib formed on the bottom, a Wheel secured to said projecting portion, and adapted to force the rib in contact with the annular groove formed in the top of and adjacent to the aperture in the top of the valve-case, means for manually opening said valve, means for varying the tension of the spiral spring as described and set forth.

Signed at Mansield, Ohio, this 24th day of November, 1905.

FRANK SCHREIDT. Witnesses:

N ELLIE CASEY, JOHN H. Goss. 

